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求助，SPI只发送不加DMA传输正常，配置DMA传输不正常，搞了好久，始终没能查出哪里有问题
环境：STM32F405RCT6, KEIL
代码如下：
#include "atk_md0130_spi.h"
/* SPI3_TX 通道0 数据流5/数据流7 */
#define ATK_MK0130_SPI (SPI3)
#define ATK_MD0130_TX_DMA_STREAM (DMA1_Stream5)
#define ATK_MD0130_TX_DMA_SREAM_CHANNEL (DMA_Channel_0)
#define ATK_MD0130_USE_SPI_DMA 1
static void LCD_SPI_GPIO_init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE); // 使能GPIOC时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_12; // PC10, PC12复用功能输出
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; // 复用功能
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; // 推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; // 100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; // 上拉
GPIO_Init(GPIOC, &GPIO_InitStructure); // 初始化
GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_SPI3); // PC10复用为 SPI3_SCK
GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_SPI3); // PC12复用为 SPI3_MOSI
return;
}
#if ATK_MD0130_USE_SPI_DMA
uint8_t m_DMA_buf1[8];
/**
* @brief SPI3 DMA 初始化 (只发送)
* @param 无
* @retval 无
*/
static void LCD_SPI_DMA_Init(void)
{
DMA_InitTypeDef DMA_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE); // SPI3 使用 DMA1
// 先复位 DMA
DMA_DeInit(ATK_MD0130_TX_DMA_STREAM);
while (DMA_GetCmdStatus(ATK_MD0130_TX_DMA_STREAM) != DISABLE);
DMA_StructInit(&DMA_InitStructure);
// SPI3 TX 对应: DMA1_Stream7, Channel_0
DMA_InitStructure.DMA_Channel = ATK_MD0130_TX_DMA_SREAM_CHANNEL; // DMA通道0
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ATK_MK0130_SPI->DR; // 外设地址
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)0; // 内存地址
DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral; // 内存 -> 外设
DMA_InitStructure.DMA_BufferSize = 0;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; // 外设地址不自增
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; // 内存地址自增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; // 外设数据大小
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; // 内存数据大小
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; // 正常模式
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium; // 中优先级
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; // 禁用FIFO
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; // 内存突发传输模式单字节
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; // 外设突发传输模式单字节
DMA_Init(ATK_MD0130_TX_DMA_STREAM, &DMA_InitStructure);
return;
}
#endif
/**
* @brief ATK-MD0130模块SPI接口初始化
* @param 无
* @retval 无
*/
void atk_md0130_spi_init(void)
{
SPI_InitTypeDef SPI_InitStructure;
LCD_SPI_GPIO_init();
#if ATK_MD0130_USE_SPI_DMA
LCD_SPI_DMA_Init();
#endif
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, ENABLE); // 复位SPI3
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, DISABLE); // 停止复位SPI3
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE); // 时钟
SPI_StructInit(&SPI_InitStructure);
SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx; // 发送模式
SPI_InitStructure.SPI_Mode = SPI_Mode_Master; // 作为主机使用
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; // 数据长度8
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(ATK_MK0130_SPI, &SPI_InitStructure);
SPI_Cmd(ATK_MK0130_SPI, ENABLE);
#if ATK_MD0130_USE_SPI_DMA
DMA_Cmd(ATK_MD0130_TX_DMA_STREAM, DISABLE);
SPI_DMACmd(ATK_MK0130_SPI, SPI_DMAReq_Tx, DISABLE);
#endif
}
/********************************************************************
* @创建人 : YEFENG
* @功能 : 读写一个字节
*
* @输入 : TxData:要写入的字节
* @输出 : 读取到的字节
********************************************************************/
void LCD_SPI_ReadWriteByte(u8 TxData)
{
while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE) == RESET);
SPI_I2S_SendData(ATK_MK0130_SPI, TxData);
while (SPI_I2S_GetFlagStatus(ATK_MK0130_SPI, SPI_I2S_FLAG_BSY) == SET);
}
/**
* @brief SPI DMA 发送一组数据 (阻塞等待完成)
* @param buf: 数据指针
* @param len: 长度
* @retval 无
*/
void lcd_spi_dma_send(uint8_t *buf, uint32_t len)
{
while (SPI_I2S_GetFlagStatus(ATK_MK0130_SPI, SPI_I2S_FLAG_TXE) == RESET);
/* 关闭DMA发送请求 */
SPI_DMACmd(ATK_MK0130_SPI, SPI_DMAReq_Tx, DISABLE);
/* 关闭DMA */
DMA_Cmd(ATK_MD0130_TX_DMA_STREAM, DISABLE);
while (DMA_GetCmdStatus(ATK_MD0130_TX_DMA_STREAM) != DISABLE);
/* 清除DMA标志位 */
DMA_ClearFlag(ATK_MD0130_TX_DMA_STREAM, DMA_FLAG_FEIF5 | DMA_FLAG_DMEIF5 | DMA_FLAG_HTIF5 | DMA_FLAG_TEIF5 | DMA_FLAG_TCIF5);
/* 设置DMA参数 */
DMA_MemoryTargetConfig(ATK_MD0130_TX_DMA_STREAM, (uint32_t)buf, DMA_Memory_0);
DMA_SetCurrDataCounter(ATK_MD0130_TX_DMA_STREAM, len);
/* 启动DMA */
DMA_Cmd(ATK_MD0130_TX_DMA_STREAM, ENABLE);
while (DMA_GetCmdStatus(ATK_MD0130_TX_DMA_STREAM) != ENABLE);
/* 开启DMA发送请求 */
SPI_DMACmd(ATK_MK0130_SPI, SPI_DMAReq_Tx, ENABLE);
while(DMA_GetFlagStatus(ATK_MD0130_TX_DMA_STREAM, DMA_FLAG_TCIF5) == RESET);
/* 等待发送完成 */
while (SPI_I2S_GetFlagStatus(ATK_MK0130_SPI, SPI_I2S_FLAG_BSY) == SET);
return;
}
/**
* @brief ATK-MD0130模块SPI接口发送数据
* @param 无
* @retval 无
*/
void atk_md0130_spi_send(uint8_t *buf, uint32_t len)
{
#if ATK_MD0130_USE_SPI_DMA
lcd_spi_dma_send(buf, len);
#else
uint32_t i = 0;
for (i = 0; i < len; i++)
{
LCD_SPI_ReadWriteByte(buf[i]);
}
#endif
return;
}
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